Close Btn

Select Your Regional site

Close

A New WDS Spectrometer for Valence Electron Spectroscopy Based on Electron Microscopy

JEOLnews Volume 47, Number 1, 2012 Masami Terauchi†, Hideyuki Takahashi††, Nobuo Handa††,
Takanori Murano††, Masato Koike†††, Tetsuya Kawachi†††, Takashi
Imazono†††, Masaru Koeda††††, Tetsuya Nagano††††, Hiroyuki
Sasai††††, Yuki Oue††††, Zeno Yonezawa†††† and Satoshi Kuramoto††††

† IMRAM, Tohoku University
†† EO Peripheral Component Business Unit, JEOL Ltd.
††† Quantum Beam Science Directorate, Japan Atomic Energy Agency
†††† Device Department, SHIMADZU Corp.

A new WDS spectrometer for a transmission electron microscope has been constructed. This spectrometer can cover an energy region from 50 eV to 3800 eV by using four aberration-corrected gratings for flat-field optics. By using a newly designed and manufactured grating of JS50XL for 50-200 eV, soft-X-ray emission spectra of simple metals of Mg, Li, Al and Be were measured. Those intensity profiles correspond to partial density of states of valence electrons (bonding electrons) and also showed clear Fermi edges (top of the occupied state). At the Fermi edge of Mg-L emission(49.5 eV), an energy resolution was evaluated to be 0.16 eV. Si-L emission spectra of Si and TiSi2 show a difference in those intensity distributions, indicating different valenceelectron states for those materials. A comparison of B-K emission spectra of CaB6 and LaB6, which were obtained by using another grating of JS200N, is shown. A clear Fermi edge was also observed for LaB6 at about 187 eV with an energy resolution of 0.4 eV.

Please see the PDF file for the additional information.

PDF 5.87MB
Close
Notice

Are you a medical professional or personnel engaged in medical care?

Yes

No

Please be reminded that these pages are not intended to provide the general public with information about the products.

Science Basics

Easy explanation about mechanisms and
applications of JEOL products

Contacts

JEOL provides a variety of support services to ensure that our customers can use our products with peace of mind.
Please feel free to contact us.